GPT-5.3-Codex

curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5.3-codex","messages":[{"role":"user","content":"Write a Python script to monitor system CPU and memory usage"}]}'

curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model":"openai/gpt-5.3-codex",
    "messages":[{"role":"user","content":"Check my GitHub repo for open pull requests"}],
    "tools":[{
      "type":"function",
      "function":{
        "name":"list_github_prs",
        "description":"List open pull requests for a GitHub repository",
        "parameters":{
          "type":"object",
          "properties":{
            "repo":{"type":"string","description":"Repository name"},
            "owner":{"type":"string","description":"Repository owner"}
          },
          "required":["repo","owner"]
        }
      }
    }],
    "tool_choice":"auto"
  }'

curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5.3-codex","messages":[{"role":"user","content":"Write a Docker Compose file for a Node.js app with PostgreSQL"}],"stream":true}'

curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5.3-codex","messages":[{"role":"user","content":"Debug this memory leak in the following Go code..."}],"reasoning":{"effort":"high"}}'